package com.wy.utils;

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;

/**
 * spring工具类 通过该工具类可以进行获取bean的实例
 */
public class SpringUtil {

	private static ApplicationContext applicationContext;

	/**
	 * 设置applicationContext
	 * 
	 * @param applicationContext
	 * @throws BeansException
	 */
	public static void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
		if (SpringUtil.applicationContext == null) {
			SpringUtil.applicationContext = applicationContext;
		}
	}

	// 获取applicationContext
	public static ApplicationContext getApplicationContext() {
		return applicationContext;
	}

	// 通过name获取 Bean.
	public static Object getBean(String name) {
		return getApplicationContext().getBean(name);
	}

	// 通过class获取Bean.
	public static <T> T getBean(Class<T> clazz) {
		return getApplicationContext().getBean(clazz);
	}

	// 通过name,以及Clazz返回指定的Bean
	public static <T> T getBean(String name, Class<T> clazz) {
		return getApplicationContext().getBean(name, clazz);
	}
}